B-OTDR Solution for Independent Temperature and Strain Measurement in a Single Acquisition

Clément, Pierre; Gabet, Renaud; Jaouën, Yves

doi:10.1109/jlt.2021.3088956

Cited by 9 publications

(15 citation statements)

References 20 publications

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“…Both Φ-OTDR and COTDR take advantage of the Rayleigh scattering, and BOTDR and BOTDA use SpBS or SBS light for temperature and strain measurements. Apart from the multi-parameter measurement (temperature, strain, vibration, and loss) based on the integration of discrete sensing characteristics [ 145 , 192 , 193 , 194 , 195 , 196 ], there is also a focus on the handling of the temperature/strain cross-sensitivity among the Brillouin scattering-based sensors with the assistance of Rayleigh scattering [ 172 , 197 , 198 ]. In addition, the combination of BOTDA/BOTDR and frequency-sweeping Rayleigh scattering-based DOFS can provide comprehensive and accurate strain or temperature measurements [ 199 , 200 , 201 ].…”

Section: Advances Of Hybrid Dofsmentioning

confidence: 99%

Hybrid Distributed Optical Fiber Sensor for the Multi-Parameter Measurements

Zhou

Wang

Yang

et al. 2023

Sensors

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Distributed optical fiber sensors (DOFSs) are a promising technology for their unique advantage of long-distance distributed measurements in industrial applications. In recent years, modern industrial monitoring has called for comprehensive multi-parameter measurements to accurately identify fault events. The hybrid DOFS technology, which combines the Rayleigh, Brillouin, and Raman scattering mechanisms and integrates multiple DOFS systems in a single configuration, has attracted growing attention and has been developed rapidly. Compared to a single DOFS system, the multi-parameter measurements based on hybrid DOFS offer multidimensional valuable information to prevent misjudgments and false alarms. The highly integrated sensing structure enables more efficient and cost-effective monitoring in engineering. This review highlights the latest progress of the hybrid DOFS technology for multi-parameter measurements. The basic principles of the light-scattering-based DOFSs are initially introduced, and then the methods and sensing performances of various techniques are successively described. The challenges and prospects of the hybrid DOFS technology are discussed in the end, aiming to pave the way for a vaster range of applications.

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Section: Advances Of Hybrid Dofsmentioning

confidence: 99%

Hybrid Distributed Optical Fiber Sensor for the Multi-Parameter Measurements

Zhou

Wang

Yang

et al. 2023

Sensors

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“…Fiber optic distributed temperature sensing (DTS) has attracted considerable attention in various applications, such as pipeline flux leakage monitoring [1], fire detection systems [2] and cable fault location [3] for the advantages of distributed measurement capability, long sensing range and electromagnetic interference immunity. To date, several methods have been proposed to realize DTS by using the intrinsic scattering effect in optical fiber, i.e., Raman [4,5], Brillouin [6] and Rayleigh scattering [7][8][9][10]. Among them, DTS based on an optical time domain reflectometer (OTDR) and optical frequency domain reflectometer (OFDR) exhibit a high signal-to-noise ratio (SNR) due to the high intensity of the Rayleigh backscattering (RBS), where the temperature distribution can be demodulated by analyzing the intensity or wavelength change of the RBS signal [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…To date, several methods have been proposed to realize DTS by using the intrinsic scattering effect in optical fiber, i.e., Raman [4,5], Brillouin [6] and Rayleigh scattering [7][8][9][10]. Among them, DTS based on an optical time domain reflectometer (OTDR) and optical frequency domain reflectometer (OFDR) exhibit a high signal-to-noise ratio (SNR) due to the high intensity of the Rayleigh backscattering (RBS), where the temperature distribution can be demodulated by analyzing the intensity or wavelength change of the RBS signal [7][8][9][10]. The DTS based on OTDR is suitable for long-distance optical fiber link monitoring with meter-level low spatial resolution [7,9].…”

Section: Introductionmentioning

confidence: 99%

“…Among them, DTS based on an optical time domain reflectometer (OTDR) and optical frequency domain reflectometer (OFDR) exhibit a high signal-to-noise ratio (SNR) due to the high intensity of the Rayleigh backscattering (RBS), where the temperature distribution can be demodulated by analyzing the intensity or wavelength change of the RBS signal [7][8][9][10]. The DTS based on OTDR is suitable for long-distance optical fiber link monitoring with meter-level low spatial resolution [7,9]. Compared with DTS based on OTDR, the DTS based on OFDR can achieve a high spatial resolution of a millimeter-level by using continuous optical modulation technology and the frequency domain analysis method [8,10].…”

Section: Introductionmentioning

confidence: 99%

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High-Spatial-Resolution OFDR Distributed Temperature Sensor Based on Step-by-Step and Image Wavelet Denoising Methods

Sui

et al. 2022

Sensors

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A high-spatial-resolution OFDR distributed temperature sensor based on Au-SMF was experimentally demonstrated by using step-by-step and image wavelet denoising methods (IWDM). The measured temperature between 50 and 600 °C could be successfully demodulated by using SM-IWDM at a spatial resolution of 3.2 mm. The temperature sensitivity coefficient of the Au-SMF was 3.18 GHz/°C. The accuracy of the demodulated temperature was approximately 0.24 °C. Such a method has great potential to expand the temperature measurement range, which is very useful for high-temperature applications.

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“…Generic distributed temperature measurement techniques are optical time domain reflectometer (OTDR) and optical frequency domain reflectometer (OFDR) allowing the user to freely set the desired spatial resolution along the fiber length. 101,102 Yu et al performed OFDR-based DFOS temperature measurements on the surface of an A5-size pouch cell. 103 Yang developed a simplified sensor hardware and improved signal-tonoise ratio for the OFDR sensor based on this.…”

mentioning

confidence: 99%

Review—Online Monitoring of Internal Temperature in Lithium-Ion Batteries

Xiao¹,

Liu²,

Zhao³

et al. 2023

J. Electrochem. Soc.

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In recent years, fire and explosion accidents caused by high temperatures of lithium-ion batteries have become increasingly frequent, and the safety and reliability of batteries have been of great concern. Battery temperature monitoring is an important means to prevent the occurrence of safety accidents, but at present, it mainly focuses on the external temperature and lacks the monitoring of internal temperature changes and measurement of physical parameters of the battery, which makes it difficult to effectively solve the safety problem of the battery. In this paper, starting from the thermal runaway safety problem faced by Li-ion batteries, we analyze the heat generation principle and temperature effect during battery operation, and discuss various methods of internal battery temperature monitoring, including in-situ temperature measurement, multi-parameter measurement inside the battery, temperature measurement based on thin-film sensors and distributed fiber optic sensors, and impedance-based temperature estimation. Also, the advantages and disadvantages of different sensing techniques are compared, and the challenges of inserting temperature sensors into real batteries are reviewed. Finally, this paper presents directions and difficulties for future research on internal temperature monitoring of Li-ion batteries.

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B-OTDR Solution for Independent Temperature and Strain Measurement in a Single Acquisition

Cited by 9 publications

References 20 publications

Hybrid Distributed Optical Fiber Sensor for the Multi-Parameter Measurements

Hybrid Distributed Optical Fiber Sensor for the Multi-Parameter Measurements

High-Spatial-Resolution OFDR Distributed Temperature Sensor Based on Step-by-Step and Image Wavelet Denoising Methods

Review—Online Monitoring of Internal Temperature in Lithium-Ion Batteries

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